Geological Sciences Inst.
Susan Meredith
D. V. Subba Rao
Gaston Sieffermann
Horst Marschner
Frederick Arthur Burt
Joe Boris Dixon
Roy Brewer
J. L. Sehgal
Akhter Ahsen
B. W. Avery
Guido Ochoa Gravina
Ralph E. Grim
J. A. Kittrick
Heinz Brugger
Jacques Berthelin
NATO Advanced Study Institute on Iron in Soils and Clay Minerals (1985 Bad Windsheim, Germany)
China.
Dimas Malagón Castro
Thomas H. Means